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Finding the Fourth Proportional to 1,277.50, 1,762.96 and 836.14

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Solution

The fourth proportional to 1,277.50, 1,762.96 and 836.14 is: 1,153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.50 : 1,762.96 = 836.14 : x
  2. Step 2: Convert to fraction form
    1,277.50/1,762.96 = 836.14/x
  3. Step 3: Cross multiply
    1,277.50x = 1,762.96 × 836.14
  4. Step 4: Simplify right side
    1,277.50x = 1,474,081.37
  5. Step 5: Solve for x
    x = 1,474,081.37/1,277.50
  6. Step 6: Final answer
    x = 1,153.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.